Ofcom

If like me you are sick of the hassle it takes to contact virgin media and their failure to respond to complaints, please use the Ofcom form to give them details. No, they won't investigate your issue but if enough people do this, they might finally investigate how difficult Virgin make it to leave:

https://ofcomforms.secure.force.com/formentry/SitesF...

It does not take long to fill out - it's actually easier than virgin's web complaints form.